/Engine/Plugins/Developer/Concert/ConcertSync/ConcertSyncClient/Source/ConcertSyncClient/Public/IConcertSyncClient.h
typedef TMulticastDelegate_OneParam< void, const [IConcertSyncClient](API\Plugins\ConcertSyncClient\IConcertSyncClient) * > FOnConcertClientSyncSessionStartupOrShutdown